简单英语语法 13 - 动词不定式

to+动词，构成动词不定式。
动词不定式在句子中通常充当名词使用，但有的时候也可以用作形容词和副词。

• I want to go home early today.
• I hope to be chosen as a member.
• I prefer to go there earlier.
• You need to consider various rules in writing sentences.
• You have to explain your reasoning in detail.
• You might wish to act as a teacher.
• To leave for a vacation is my only wish at this time.
• A common mistake in a relationship is not to trust the other person.
• Help me to save the trees!
• To be mentally healthy, you must read books.
• Do you want me to fill out this form?
• Here is our to-do list.
• It was nice to meet you.
• It is time to move on.
• I am young enough to change my habits.
• Don’t forget not to make grammar mistakes.
• You are required to leave all your belongings here.
• I came to see a doctor today.
• You have to work harder to succeed.
• I need to take three more classes to finish my graduate study.
  I got closer to the speaker to listen clearly.
  Be sure to check if you have tickets.
  I am going to buy the new computer.

在to和动词之间，也可以有副词。

I want you to immediately stop doing that.
You have to seriously work hard to succeed.
You need to definitely explain your reasoning in detail.

动词不定式做宾语

句型：It is _________ + 动词不定式．．．
其中，it就代表了动词不定式

• It is time to do math.
• It is common to think that way.
• It is appropriate to keep a low profile.
• It was nice to see you.
• It was my pleasure to meet you.
• It was my honor to have dinner with you.
• It is good to see you.
• It was great to go on a trip with them.

下面动词后，可以接动名词

consider, suggest, enjoy, deny, avoid, miss, mind, practice, postpone, resist, finish, quit, give up, put off

下面动词后，可以接动词不定式

offer, decide, hope, attempt, promise, agree, afford, deserve, refuse, undertake, learn, fail, seem, appear, tend, pretend, choose, demand, desire, guarantee, claim, manage, determine, expect, want, wish

下面动词后，既可以接动词不定式，也可以接动名词，两者含义相同

continue, like, love, begin, start, propose, neglect, stand, hate

下面动词后，既可以接动词不定式，也可以接动名词，但两者含义不同

forget, remember, stop, try

I stopped watching the movie. (I no longer watched the movie.)
I stopped to watch the movie. (I stopped what I was doing to watch the movie.)

参考

http://www.talkenglish.com/grammar/infinitives-1.aspx